you have to edit the preset.CAMPAIGN folder in 'game' for your preset to appear on the model.
last moon never removes files that weren't orginals saved in the same name (e.g. i edited an original last moon file and saved it without changing the name, it will be reverted back to the original image after an update).
you also need a preset script in the preset script folder with all the names of what you saved the files as, it will find them and put them ingame for you if you 'lost' them!